| 研究生: |
蘇柏瑜 Su, Bo-Yu |
|---|---|
| 論文名稱: |
樓板衝擊音隔音量測之數值評估 Numerical Evaluation on the Measurement of Sound Insulation of Floor Impact |
| 指導教授: |
林育芸
Lin, Yu-Yun |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 土木工程學系 Department of Civil Engineering |
| 論文出版年: | 2021 |
| 畢業學年度: | 109 |
| 語文別: | 中文 |
| 論文頁數: | 83 |
| 中文關鍵詞: | 樓板衝擊音 、隔音分析 、吸音分析 、穩態分析 、有限元素法 |
| 外文關鍵詞: | Floor Impact Sound, Sound Insulation, Sound Absorption, Steady-State Analysis, Finite Element Method |
| 相關次數: | 點閱:236 下載:0 |
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本文使用有限元素套裝軟體ABAQUS,模擬樓板衝擊音實驗,並將標準輕量衝擊源假設為尖脈衝或對稱矩形函數的形式,分別進行分析。為節省計算成本,本文欲使用穩態動力分析(Steady-State Dynamics, Direct)進行模擬,且以一維梁的衝擊問題驗證其方法之可行性。本文亦針對樓板衝擊音隔音之評估,討論兩種改善方法,分別為增加表面材於樓板側或增加天花板於受音側。而天花板對於樓板衝擊音的影響,將分為隔音與吸音兩個部分進行討論,並選用木纖維、岩棉、PC等三種材料,分別進行數值分析模擬,數值結果將提供裸樓板隔音改善之方向與建議。
The floor impact sound test is a method for measuring the impact sound specified by the statute. General experiments or simulations are analyzed in the time domain. However, in order to save the computing time of the simulation and make it easier to observe the response of impact sound in each frequency range, we intend to simulate the floor impact sound test in the frequency domain. By the analytical results of the one-dimensional impact analysis, we could verify that both dynamics analysis and steady-state analysis can solve the problem and get the same answer. We also explore the relationship between the hypothesis of the impact force function and the impact sound. After the numerical simulation and analysis, we can find that the floor impact sound simulated by the spike pulse or the symmetrical rectangular function has similar responses. Regarding the improvement of impact sound, we found through numerical analysis that both methods of adding floor coverings on the floor side or adding a ceiling on the side of the sound room can reduce floor impact sound.
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